Benefits of membrane surface filtration in the non-ferrous industry

摘要

Stricter particulate emission regulations and the competitive requirements to produce metal as economically as possible are driving the non-ferrous market to focus on cleaner and more efficient technologies. One area of interest is the air cleaning systems. Presently, there are many different air filtration technologies employed by the industry. Fabric filtration systems with expanded polytetrafluoroethylene (ePTFE) membrane filters are increasingly being chosen to provide optimum performance over conventional depth filtration. The selection of filtration technology greatly affects the performance of the baghouse and the process. The ePTFE membrane surface filtration provides consistently higher airflow and longer filter life, while also providing the additional benefit of the lowest particulate emission of any fabric filtration media. Membrane filtration provides these benefits in concentrate drying, primary and secondary smelter and converter baghouses, with case histories from around the world.